The state test scores for 12 randomly selected high school seniors 1430 1229 987 are shown on the right. Complete parts (a) through (c) below. 700 728 832 Assume the population is normally distributed. 720 746 547 626 1448 942 S = 305.6 (Round to one decimal place as needed.) (c) Construct a 99% confidence interval for the population mean u. A 99% confidence interval for the population mean is (Round to one decimal place as needed.)